Will the Rifle Basix MAR-1 BLACK fit my post-2005 Marlin bolt-action rimfire rifle?

No, this trigger is strictly designed for pre-2005 bolt-action Marlin rimfires and will not fit models equipped with the post-2004/2005 T-900 fire control system, such as the 900 series or 2011+ XT Pro-Fire groups. For those newer models, you will need the Rifle Basix MAR-1 alternate or MAR-917 model instead. Always verify your specific manufacturing date and receiver type before purchasing.

What is the adjustable pull weight range, and does adjusting it affect bolt removal?

The MAR-1 BLACK offers an adjustable pull weight ranging from approximately 1.0 lb to 2.5 lbs, significantly reducing the heavy and gritty feel of factory triggers. However, the manufacturer specifies that adjusting the weight of pull above 2.0 to 2.5 lbs can prevent normal bolt removal. Keep this upper threshold in mind when tuning the trigger for precision target shooting or small-game pest control in the field.

Does installing this aftermarket trigger require any gunsmithing or permanent modifications to my rifle?

No permanent modifications to your rifle receiver or stock are required for installation. The unit is a direct drop-in replacement constructed from precision EDM-cut A2 tool steel, and it comes supplied with a dedicated hardware pack, adjustment wrench, and step-by-step instructions. It also retains full compatibility and safe operation with your factory rifle safety mechanism.

Marlin Trigger Upgrade - Rifle Basix MAR-1 BLACK

The Rifle Basix MAR-1 Black Replacement Trigger is an aftermarket drop-in trigger mechanism engineered for pre-2005 Marlin bolt-action rimfire rifles. Constructed from precision EDM-cut, heat-treated A2 tool steel (hardened to Rc 50–55) with a black finish, it replaces heavy factory assemblies to eliminate creep and provide a crisp, user-adjustable break. The unit weighs approximately 0.5 oz (14 g) and installs into rifles utilising a screw or drift pivot pin configuration without stock or receiver modifications, while maintaining the function of the original factory rifle safety.

Key Features

Adjustable Pull Weight: User-tunable let-off range from 1.0 lb to 2.5 lbs (approximately 14 oz to 2.0 lbs) to eliminate factory creep and heavy resistance.
Precision Tool Steel Build: Machined from A2 tool steel heat-treated to Rc 50–55 for wear resistance across critical sear engagement surfaces.
Drop-In Installation: Directly mounts into pre-2005 Marlin rimfire receivers using supplied hardware and adjustment wrench, requiring no woodwork or metal machining.
Factory Safety Retention: Integrates directly with the rifle's existing original safety mechanism.
Multi-Calibre Compatibility: Accommodates supported pre-2005 bolt-action platforms chambered in .22 Short, .22 Long, .22 LR, .22 WMR, and .17 HMR.

Specifications

Manufacturer Part Number: MAR-1 Black
Material: EDM-cut A2 tool steel (Rc 50–55)
Finish: Black
Trigger Weight: 0.5 oz (~14 g)
Packaged Weight: ~0.106 lbs (~48 g)
Packaging Dimensions: 3 × 2 × 3 inches (157 × 91 × 15 mm)
Adjustable Pull Weight Range: 1.0 lb to 2.5 lbs
Supported Action Types: Pre-2005 Marlin bolt-action rimfires (models 15, 25, 80/Glenfield 20/25, 780, 781, 782, 783, 880, 881, 882, 883, 17V, 17VS, and 2000)
Operating Limit: Adjusting the pull weight over 2.0 to 2.5 lbs can prevent normal bolt removal

Who is the Rifle Basix Black Replacement Trigger For Marlin Rimfire Rifles (Excludes 900 Series) for?

Precision rimfire target shooters — tuning let-off resistance down to a light 1.0 lb to 2.5 lbs pull weight eliminates sear creep on compatible pre-2005 bolt-action platforms, allowing consistent trigger control for tight benchrest shot groupings with this 0.5 oz rimfire replacement trigger.
Small-game hunters and pest controllers — replacing heavy factory fire control assemblies on pre-2005 bolt-action Marlin rimfires with this 0.5 oz rimfire replacement trigger provides an adjustable pull weight down to 1.0 lb, enhancing shot placement on fast-moving rabbits and field pests while retaining the factory mechanical safety.

Less suitable for: Owners of post-2004/2005 Marlin rimfire rifles equipped with the T-900 fire control system (such as the 915, 917, 925, 980, 981, 982, or 983), lever-action platforms, or 2011+ XT Pro-Fire models; these actions require a dedicated T-900 compatible trigger assembly, an action-specific lever-action fire control group, or an XT-pattern trigger unit.

SKU	RBX41991LP
Model #	MAR-1 BLACK
Brand	Rifle Basix
Shipping Weight	1.0000kg

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Rifle Basix Mar-1 Black Replacement Trigger Adjustable 1-2.5 Lbs

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